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[Jeremy C. Reed]

> Thanks - I got it to work but not until I ran ran "export" on the env 
> variable. Any idea why this was necessary?

Setting variables followed by simple commands puts them in the 
environment and that variable is temporary for the duration of that 
command.

Setting variables without following by simple command just sets in the 
shell -- known to the shell but not set in environment. (When a new 
command is ran by that shell it won't see it.)

Using "export" puts a variable in the user process environment available 
for that new process.

So if you don't want to use export, then set the variable and run the par 
in the same command.